Feedback- Chhoi Ly

The Girl: Good drawing.  For the colour rendering you need better definition in term of contrast, details. Good reference is a must.
I desaturated the the whole colour scheme for more natural skin tone and water. I just retouched a little to show you the need of more work has to be done.
The best way to do that water, first:  look for reference and do it on separate layer. At the end you can lower the opacity of the layer to get the transparency, see through some skin colour.

The knigh: Your studies in composition and tonal  are not done yet.  Remember don't jump too fast to colours. You need to develop , find a better  composition and  masses of tone. Right now it's not ready yet.

Dispose , interplay your masses the way that they look interesting., control the contrast between them. Find the angle of camera to crate drama, strong impression of the scene.

Remember:

Composition

Values

Colour

Edges

Details